Decision-feedback equalizer capable of producing an equalized si

Details Decision-feedback equalizer capable of producing an equalized si Decision-feedback equalizer capable of producing an equalized si

1992-02-19

1994-02-08

Kuntz, Curtis

Pulse or digital communications

Repeaters

Testing

36472416, 36472419, H03H 730

Patent

active

052854752

ABSTRACT:
In a decision-feedback equalizer for use in combination with a demodulator (13) to equalize a demodulated signal into an equalized signal through first and second transversal filters (15, 16), the demodulated signal and an input signal are filtered by the first and the second transversal filters into the first and the second filtered signals in accordance with a plurality of main controllable tap gains and a plurality of subsidiary controllable tap gains, respectively. The input signal supplied to the second transversal filter is controlled or selected by a supplying circuit (42). Specifically, the supplying circuit (42) produces as the input signal a first local signal obtained from the demodulated signal when the demodulator is put in a synchronization state. The supplying circuit produces as the input signal a second local signal obtained from the equalized signal when the demodulator is put out of the synchronization state.

REFERENCES:
patent: 4672631 (1987-06-01), Suzuki et al.
Proakis, "Decision-Feedback Equalization", Digital Communications, pp. 382-385, 1983.

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